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AleksAgata [21]
4 years ago
10

An object is launched at 25 m/s from a height of 80 m. The equation for the height (h) in terms of time (t) is given by h(t)= -4

.9t^2 + 25t + 80. What is the objects maximum height?
Mathematics
1 answer:
Reptile [31]4 years ago
5 0
Use the formula for finding axis of symmetry:


        -b           -25         -25         
x = ------  ⇒ --------- = -------- = 2.6 
       2a         2(-4.9)     -9.8



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Jenna is at a fair with four friends. They all want to ride the roller coaster, but only three people can fit in a car. How many
pav-90 [236]

Answer:

They can make 10 different groups of three.

Step-by-step explanation:

The order in which the people are in the car is not important, so we use the combinations formula to solve this question.

Combinations formula:

C_{n,x} is the number of different combinations of x objects from a set of n elements, given by the following formula.

C_{n,x} = \frac{n!}{x!(n-x)!}

How many different groups of three can the five of them make?

Combinations of 3 from a set of 5. So

C_{5,3} = \frac{5!}{3!(5-3)!} = 10

They can make 10 different groups of three.

6 0
3 years ago
Which statement is true?
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7 0
4 years ago
Write an equation describing the relationship of the given variables. y varies inversely as the cube root of x and when x=125, y
notka56 [123]

Answer:

y = 40 / x^1/3

Step-by-step explanation:

Given that :

y α x^1/3

y = k * 1 / x^1/3

y = k / x^1/3

When x = 125 ; y = 8

8 = k / 125^1/3

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8 * 5 = k ; k = 40

Hence, expression becomes :

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4 0
3 years ago
What's 1/2 x 3 1/2, I'm only in 6th grade so I don't know much, if you respond with the correct answer, thank you a lot.
andrezito [222]

Answer:

1 75/100 or 3/4

Step-by-step explanation:

if you simplify 1 75/100 its 3/4

8 0
3 years ago
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Answer:

The margin of error is given below:

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Where:

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7 0
3 years ago
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